Steam-boiler.



PATENTED JAN. 14, 1908.

0. 1); MOSHER. STEAM BOILER.

APPLIOATION FILED DEC. 24, 1906.

2 SHEETSSHEET 1.

I/VVENTUR ATTORNEY WITNESSES."

No. 876,478. PATENTED JAN. 14, 1908.

0. 1). MOSHER. STEAM BOILER.

APPLICATION FILED DEC. 24, 1906.

' 2 SHEETS-SHEET 2.

WITNESSES: l/VVE/VTOR ATTORNEY CHARLES D. MOSHER, OF NEW YORK, N. Y..

STEAM-BOILER.

No. creme.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed December 24.1906- Serial No. 349.315.

T all whom it may concern:

Be it known that 1, CHARLES D. MosHER, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Steam- Boilers, of which the following is a specilication.

This invention relates to water-tube steam-boilers, and it has for its object to provide an improved tube-wall for the side and front furnace-walls of the boiler, or either of them, and furthermore to facilitate the removal and replacement of the individual tubes of such a tube-wall.

Of the accompanying drawings, Figure 1 represents a side elevation of the interior parts of a steam-boiler having tubewalls constructed in accordance with my invention.

Fig. 2 represents a front elevation of the i boiler, partly in section.

The same reference characters indicate the same arts in both views.

In the dirawings, is a transverse upper steam-and-water drum at the front of the boiler and 11 is a parallel transverse waterdrum at the lower rear part'of the boiler, connected with the steam-and-water drum by a group of inclined curved water-tubes 12,

tube-wall composed ofcurved water-tubes 2t), having their lower ends fixed in one i of the horizontal returnpipes 16, and their upper ends staggered and fixed circumferentially in the steam-and-water drum-10 in about the same horizontal zone as the up er ends of the main evaporating-tubes 12. he 1 per ends of the side-wall tubes are as c csely grouped as permissible, and from thence the tube-"wall spreads fanwise and curves downwardly so as to include practically the entire side of the furnacechamber.

T he boiler also has a front tube-wall composed of a linearrow of tubes 21 extending l suc fire-doors l9, and having their lower ends fixed in the cross-pipe 18 and their upper ends fixed in the steamand-water-drum 10.

Outside of the frontand side tube-walls the boiler has the usual refractory-lined casing. The tube-walls serve to interce t much of. the radiant heat and some of tlie conduction heat which would otherwise be wasted, and they also protect the refractory linings and serve to hold the same in place.

Irrespective of their method of withdrawal and replacement, which l shall presently describe, I find tube-walls of the described construction and location to be a useful improvement in boilers on account of their simple and durable character, the particular characteristic of the side-walls being a group or row of tubes emanating from an upper drum and spread fanwise to enter a return-pi c or other suitable manifold structure in t e lower part of the boiler, while the articular characteristic of the front tube-wa l is a row or group of tubes emanating from the upper drum and having their lower ends connected in a crosspipe or other manifold structure located at the front of the boiler and preferably above the. furnace doors. It will be noted that the side-wall tubes constitute a circumferential row or rows in the steamand-water drum 10 at the ends of the main group of tubes 12, .2, while the front-wall tubes constitute a longitudinal or axial row or rows of tubes in said drum at the front of the main group of tubes. In. both cases the upper ends of the tubes may be stag ered in two rows in order to obtain a sufficiently close grouping of the lower ends, but in any case one of. the tube-walls need not add to the zone of tube-ends in the steam-and-water drum by more than one or two rows.

Considerable utility and convenience is added to the above-described arrangement of the tube-walls by a further feature of my invention which consists in providing one or more holes in one of the drums to which the ends of the wall-tubes are alfixed, through which any one of the tubes of the tube-wall may be withdrawn and replaced, said hole or holes being normally covered or stopped. In the drawing these holes are shown in the front wall of the steam-and-water drum l0 and are normally filled by removable screwplu s 22 or other covers. A single row of 1 holes is sufiicient for the entire number across the front of the furnace above the of tubes, both main and wall tubes, although no more may be provided, as for example, when the main evaporating tubes are straightas in my Patent No. 657,783, where several rows of coveredv holes are shown. The arrangementherein illustrated is such that any one of the tubes 20 of one of the side-walls may be removed through a single plug hole, a result which is promoted by spreading the tubes fanwise, as shown, and imparting to them a curvature which will direct any tubetoward and through the plug-hole when its ends are loosened and the tube slid lengthwise through its hole in the tube-sheet .of the drum 10. The tubes 21 of the front wall require a row of holes (or a long opening), and the tubes, when loosened, have a sufficient play in the tube-sheet so that a plurality of the front-wall tubes may use the same plug-hole. I have, in Y these drawings, as will be seen, arranged so that the tubes of the tube-walls are inserted and withdrawn through the same row of plug-holes as the -main evaporating-tubes 12 thus using a minimum number or extent of holes.

I claim p 1. A steam-boiler comprising a furnace, a main eva orating-stnrclure includinga drum, and a wa l of water-tubes included in the furnace inclosure and forming a secondary evaporating-structure, said tubes having their ends fixed in the drum and spreading fanwise therefrom.

2. A water-tube boiler comprising a furnace, a transverse steam-and-water drum ex-' tending across the front of the boiler, a series of main evaporating-tubes emanating from said drum, and a wall of water-tubes emanating from said drum and included in that part of the furnace inclosure which comprises the front and side wall-structure thereof.

3. A water-tube boiler comprising a furnace, a main evaporating-structure which includes an upper steam-and-water drum, a group of evaporating-tubes located above the furnace, a forward-and-rearward base manifold at the side of the furnace, and a side wall of water tubes having their lower ends fixed in said manifold and their upper ends fixed circumfcrentially in the steam and water drum.

4, A water-tube boilercomprising a furnace having a lire-door and an u per transverse steamandwater drum at t 1e front of the boiler, a air of side downtake-pipes leading from said steam-andwater drum, a crosspipe connected with said downtake-pipes above the fire-door, a front tube-wall comosed of water-tubes having their lower ends xcd in said cross pipe and their upper ends fixed in the steam-and-waterdruni. said tubewall being directlv exposed to the heat of the furnace combustion-chamber, and a refrac tory furnace lining located in front of said front-wall tubes and deriving lateral support therefrom.

5. A boiler comprising a furnace having a refractory lining, a drum having one or more holes provided with removable covers, a grou of main evaporating tubes traversed by tfie furnace gases and having their ends fixed in said drum, and a tube-wall distinct from the main tube-group and located next the furnace lining and ex osed to the fire, said wall being com osed of \\'ater-tul)es having their ends fiXGLl iH said drum and withdrawable through said hole or holes.

6. A boiler comprising a furnace, a main eva porating-structure including a steam-andwater drum located at the front of the boiler and having a row of holes provided with removable covers, and a series of tubes forming a front wall for said furnace and adapted to be withdrawn through said holes.

7. A water-tube. boiler comprising a furnace,a main evaporating-structure including upper and lower drums, a connecting group 0 inclined water-tubes located over the furnace conibustion-chamber, a series of secondary water-tubes at the end of said group included in the furnace wall-structure, and one or more normally-closed holes located in' the wall of the upper drum opposite the tube ends and serving for the withdrawal of both main and secondary tubes.

8.. A water-tube boiler comprising a fur nace, an upper transverse steam-and-water drum, a parallel lower water-drum, a connecting series of watertubes, a return circulation circuit including a base manifold in the side of the furnace, a side tube-wall including a series of water-tubes spreading fanwise from the steani-and-water drum to the base inanifold, and a norn'ially-closed aperture formed in the wall of the steam-and-water drum 0 posite the ends of the'side-wall tubes for withdrawing said tubes.

9. A water-tube boiler comprising a furnace, upper and lower transverse drums, a connecting group of main evaporating-tubes, front and side tube-walls included in the furnace inclosure and composed of watertubes having their upper ends fixed in the upper drum adjacent the ends of the main tubes, a single longitudinal series or row of holes formed in the upper drum opposite the ends of the tubes and serving for the withdrawal of both the main tubes and the wall tubes, and removable covers for said holes.

10. A steam-boiler comprising'a furnace, a transverse upper steam-and-water drum, a parallel lower water-drum, a connecting series of main evaporating-tubes, side returncirculating conduits including upright pipes and horizontal base pipes, a cross horizontal pipe connecting the upright pipes, side tubewalls com )osed of water-tubes having their upper ends fixed in the steam-and-water drum and their lower ends fixed in the horizontal base pipes, a front tube-wall composed of water-tubes having their upper ends fixed in the steam-and-water drum and theirlower ends fixed in the cross horizontal pipe, and a series of normally-closed openings formed in the front wall of the steam-and water drum opposite the tube-ends for the withdrawal of the main tubes and the wall tubes. 1

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses, the 14th day of December, 1906.

CHARLES D. MOSHER.

Witnesses:

R M. PIERSON. G. BLAKE. 

